Several other investigators have studied parenting style by relating it to variables likernachievement, adjustment and others. Little research has been made to relate parenting style tornadolescent aggression particularly in Ethiopia.rnThis research was approached with two objectives; first to investigate the relationshiprnbetween parenting styles and adolescent aggression; second to examine the effect of gender onrnadolescent aggression. In this investigation data where gathered using systematic randomrnsampling technique and analyzed using ANOVA and descriptive statistics methods for the 336rnselected adolescent students ranging from 15 to 18 years of age. The rationale behind the selectionrnof these grade levels was that most of the students in these grades and schools are found in thernadolescence stage of development.rnIn this investigation, the adolescent students rated the perceptions of their own parents orrnguardians about the two dimensions of parenting styles, namely responsiveness or acceptance andrndemandingness or control. In the same way, the adolescent students rated themselves on how theyrnperceived their own level of aggression.rnBased on these dimensions, the targeted adolescents were assigned to one of parentingrnstyles by which they were brought up and characterized as authoritative, authoritarian, indulgentrnand neglectful. This research found out that the adolescents from authoritarian, indulgent andrnneglectful parenting styles manifested significantly more physical, verbal and indirectrnaggression (F= 87.84. P